Best Space Pictures: Rover Selfie, Black Hole Blast
Hubble gets lost, an ultramassive black hole blasts away, and the moon photobombs the sun in this week's best space pictures.
Often, microscopic algae are responsible for creating these beautiful light shows in the ocean. Physically tumbling around in ocean waves can trigger the production of this kind of illumination.
Major parts of the U.S. have suffered under the chilly embrace of Arctic air, courtesy of the polar vortex—a mass of freezing cold air blown south from Canada.
Residents of the Gulf Coast states and those up the Eastern Seaboard have been treated to snowstorms and temperatures that wouldn't seem out of place in Alaska. (See "Editor's Pick: Best Photos From the Southern Snowfall.")
This especially frosty winter manifests in the clouds and snow that blanket much of the U.S. East Coast in this NOAA satellite image taken January 28.